## Change Log
+### Unreleased
+
+#### _Black_
+
+- Set `--pyi` mode if `--stdin-filename` ends in `.pyi` (#2169)
+- Add `--no-diff` to black-primer to suppress formatting changes (#2187)
+
+- Stop detecting target version as Python 3.9+ with pre-PEP-614 decorators that are
+ being called but with no arguments (#2182)
+
+### 21.4b2
+
+#### _Black_
+
+- Fix crash if the user configuration directory is inaccessible. (#2158)
+
+- Clarify
+ [circumstances](https://github.com/psf/black/blob/master/docs/the_black_code_style.md#pragmatism)
+ in which _Black_ may change the AST (#2159)
+
+#### _Packaging_
+
+- Install `primer.json` (used by `black-primer` by default) with black. (#2154)
+
+### 21.4b1
+
+#### _Black_
+
+- Fix crash on docstrings ending with "\ ". (#2142)
+
+- Fix crash when atypical whitespace is cleaned out of dostrings (#2120)
+
+- Reflect the `--skip-magic-trailing-comma` and `--experimental-string-processing` flags
+ in the name of the cache file. Without this fix, changes in these flags would not take
+ effect if the cache had already been populated. (#2131)
+
+- Don't remove necessary parentheses from assignment expression containing assert /
+ return statements. (#2143)
+
+#### _Packaging_
+
+- Bump pathspec to >= 0.8.1 to solve invalid .gitignore exclusion handling
+
### 21.4b0
#### _Black_
- Added parsing support for unparenthesized tuples and yield expressions in annotated
assignments (#1835)
-- use lowercase hex strings (#1692)
-
- added `--extend-exclude` argument (PR #2005)
- speed up caching by avoiding pathlib (#1950)